So as the URSA Min 4.6K is now shipping and many already have their hands on the URSA Mini 4K I thought it might be good to compile an updated Lens Compatibility List.

Many have asked if APS-C lenses will vignette on the 4.6K sensor. Some will (mostly Canon branded), some won't (those that are also available in Nikon mount). So I've added an extra field to test for this.

Glenn Hanns wrote:Has anyone used the canon CN-E range of lenses on the UM4.6k? Mine aren't showing the Tstop in the viewfinder correctly, just a random aperture that's locked no matter what your lens is set to...

The CN-E lenses have manual aperture. So the camera does not control the aperture and have not way of knowing what it's set to. You read the aperture from the lens barrel kist like you do on any other cine lens.

Glenn Hanns wrote:Has anyone used the canon CN-E range of lenses on the UM4.6k? Mine aren't showing the Tstop in the viewfinder correctly, just a random aperture that's locked no matter what your lens is set to...

The CN-E lenses have manual aperture. So the camera does not control the aperture and have not way of knowing what it's set to. You read the aperture from the lens barrel kist like you do on any other cine lens.

Really, I didn't realise my lenses were manual.... What I'm saying is that the communication between the lens and the camera should tell the camera what stop they are at so that this information is displayed in the viewfinder.

Glenn Hanns wrote:Really, I didn't realise my lenses were manual.... What I'm saying is that the communication between the lens and the camera should tell the camera what stop they are at so that this information is displayed in the viewfinder.

As the camera is not in control of the iris it won't display the aperture value. Same applies if you use the Carl Zeiss CP.2 Primes or the Schneider Xenon FF-Primes.

Glenn Hanns wrote:Really, I didn't realise my lenses were manual.... What I'm saying is that the communication between the lens and the camera should tell the camera what stop they are at so that this information is displayed in the viewfinder.

As the camera is not in control of the iris it won't display the aperture value. Same applies if you use the Carl Zeiss CP.2 Primes or the Schneider Xenon FF-Primes.

That wasn't true when used on the canon c-500, there are contacts on the lens for a reason, one of those is to send information back to the camera. So it should be a reasonable expectation that BM could display that in the viewfinder.

Glenn Hanns wrote:Really, I didn't realise my lenses were manual.... What I'm saying is that the communication between the lens and the camera should tell the camera what stop they are at so that this information is displayed in the viewfinder.

As the camera is not in control of the iris it won't display the aperture value. Same applies if you use the Carl Zeiss CP.2 Primes or the Schneider Xenon FF-Primes.

That wasn't true when used on the canon c-500, there are contacts on the lens for a reason, one of those is to send information back to the camera. So it should be a reasonable expectation that BM could display that in the viewfinder.

That's on a Canon body with Canon proprietary firmware... you'll obviously get more info passed back and forth between the camera and the lens.

BM has reverse engineered the Canon protocols so they can control EF lenses. Canon don't publish any of those specs so support is limited. One of the reasons for the list above.

adamroberts wrote:[quote="Glenn Hanns"]Really, I didn't realise my lenses were manual.... What I'm saying is that the communication between the lens and the camera should tell the camera what stop they are at so that this information is displayed in the viewfinder.

As the camera is not in control of the iris it won't display the aperture value. Same applies if you use the Carl Zeiss CP.2 Primes or the Schneider Xenon FF-Primes.

That wasn't true when used on the canon c-500, there are contacts on the lens for a reason, one of those is to send information back to the camera. So it should be a reasonable expectation that BM could display that in the viewfinder.

That's on a Canon body with Canon proprietary firmware... you'll obviously get more info passed back and forth between the camera and the lens.

BM has reverse engineered the Canon protocols so they can control EF lenses. Canon don't publish any of those specs so support is limited. One of the reasons for the list above. [/quote]

I guess I'm hoping that if propriety protocols have been worked out to control iris on L series glass then a simple information readout is beyond the scope of the engineers at BM?

I have the Tamron equivalent/exact knock-off of this Canon lens. When mounted on my mini 4.6k, the aperture setting goes to "A" for automatic, but I can't make any adjustments to the iris. The Iris button, which I think is supposed to function as a "one touch" auto-iris setting isn't working either.

Is this a lens that's just not going to work on the 4.6k? Or is is a firmware update equation?thanks!

If you have lenses to add to the list, please use this template as it makes it easier to manage the list:Here is the template:Lens model:Focal Length:AF works: (yes/no)Aperture control: (yes/no)IS works: (yes/no/NA)Vignettes: (yes/no) *on the 4.6K

If anyone with a URSA Mini 4.6K, based in Los Angeles, wants to do a through test with the Canon CN-E Cine Primes (24, 35, 50 & 85) to check how it performs with them I am more than happy to meet up. PM to discuss further.

Has anyone any update regarding the Canon 70-200 f/2.8 II IS on URSA Mini 4K EF ?Aperture control works for me one out of ten time, with the firmware 3. I made sure connectors are OK when attaching the lens, and the weight of the lens supported on a plate.

Mickael Lafont wrote:Has anyone any update regarding the Canon 70-200 f/2.8 II IS on URSA Mini 4K EF ?Aperture control works for me one out of ten time, with the firmware 3. I made sure connectors are OK when attaching the lens, and the weight of the lens supported on a plate.

Thanks

Still no aperture and IS for me with Camera 3.2Works with the 1.4 III Extender though.

Bad supported FW, and not for that lens only....Basic Canon L still primes does not work in my Mini 4K EFEF 14mm 2,8 IIEF 24 1,4 II

Mickael Lafont wrote:Has anyone any update regarding the Canon 70-200 f/2.8 II IS on URSA Mini 4K EF ?Aperture control works for me one out of ten time, with the firmware 3. I made sure connectors are OK when attaching the lens, and the weight of the lens supported on a plate.

Thanks

Still no aperture and IS for me with Camera 3.2Works with the 1.4 III Extender though.

Bad supported FW, and not for that lens only....Basic Canon L still primes does not work in my Mini 4K EFEF 14mm 2,8 IIEF 24 1,4 II

Mickael Lafont wrote:Has anyone any update regarding the Canon 70-200 f/2.8 II IS on URSA Mini 4K EF ?Aperture control works for me one out of ten time, with the firmware 3. I made sure connectors are OK when attaching the lens, and the weight of the lens supported on a plate.

Thanks

Still no aperture and IS for me with Camera 3.2Works with the 1.4 III Extender though.

Bad supported FW, and not for that lens only....Basic Canon L still primes does not work in my Mini 4K EFEF 14mm 2,8 IIEF 24 1,4 II

Sucks....

Please contact your nearest BMD support centre about this.

Did so via my supplier mid april and the answer didnt make my lenses work at all.....

"Thank you for contacting Blackmagic Support.

It does seem a bit strange that some of your lenses aren't working with the Mini Ursa 4K but are with both the big URSA and the Production Camera 4K. Could you please ask your customer to try the latest firmware which it 3.2.If this doesn't resolve the behaviour could you then ask them to try Blackmagic Camera 3.0.

I will forward this to our Camera developer team to see if they can provide anymore information on this."

The second time you jump in to make me contact your support for the problem Tim....

I hope your support guys will be in contact soon. At least an email to confirm the problem if not a solution.

Jerry my second point of contact was to try to speed up you getting support on this issue. I am trying to help you get this problem resolved. From what I understand our support guys have tried to contact you. Please let me know if this is not the case.

We have a fix for anyone who lost communication on some EF lenses on URSA Mini 4K between software 2.8.1 and 3.1/3.2. Your camera will need to come in for this, and I expect Mickael Lafont's will as well.

If you are able to downgrade your URSA Mini 4K to 2.8.1 and the problem goes away then this is a known issue that our support guys can fix. The camera will need to come in. I believe our guys have already reached out to you.

Hi,after update URSA Mini EF 4k to 3.3 the Canon lens L 16-35mm 2.8 II is no longer recognized. The Canon 24-70mm L 2.8 I and the 70-200mm L 2.8 I continue to work properly. Another of my lens, the Canon 100mm macro L 2.8 IS was never recognized whit 2.8 or 3.3.I live in Rome Italy and I need to continue working with 16-35mm lens, the only alternative is to go back to the old firmware?I look forward to your responseThank youPiero